/Engine/Plugins/Experimental/GameplayBehaviors/Source/GameplayBehaviorsModule/Public/GameplayBehavior.h
None if there's no actors or only the one under the index of CurrentIndex is valid
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category=GameplayBehavior, Meta=(DisplayName="GetNextActorIndexInSequence")) int32 K2_GetNextActorIndexInSequence ( int32 CurrentIndex ) const